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Fastest Block Drawing Code?Following on from my scrolling thread [URL="http://www.worldofspectrum.org/forums/showthread.php?p=351304#post351304"](http://www.worldofspectrum.org…
... way as the Spectrum screen memory is laid out. Store ... blocks that don't cross screen block (ie thirds) boundaries ... routine to find the screen address for the next ... code]
; Work out next screen line
NextPixelLine:
ld ... -
Fastest Block Drawing Code?Following on from my scrolling thread [URL="http://www.worldofspectrum.org/forums/showthread.php?p=351304#post351304"](http://www.worldofspectrum.org…
... to the Spectrum Screen layout, of course. The screen address could be ... same way as the Spectrum screen memory is laid out. Store it ... copy each line of the screen buffer to the display, fetching ... the screen address that each line has ... -
Maze Mania - How did they do it?Hi, I was looking at the game "Maze Mania" by Hewson Consultants, written in 1989. The game can be downloaded from here [URL]http://www.worldofspec…
... scroller. If you manipulate the screen redraw, you then have to ... at odd places in the screen memory, which can be more trouble ... -
River Raid Tech DemoJust a little something to look at. Enjoy. [URL="http://www.joefish.co.uk/speccy/Joefish_River_Raid_Tech_Demo_01.tap"]Joefish_River_Raid_Tech_Demo_…
... the middle of the screen. The 9 characters to ... centre section of the screen is filled with a ... address of where the screen redraw takes its attribute ... to be drawn to the screen memory, but the attributes have ... a buffer elsewhere in the memory.
If ... -
Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
... synchronise themselves; any write to screen memory during the 128 T-States ... -
Rainbow Generator for 48K Spectrum using PUSHThis is what I came up with from [B]gasman[/B]'s suggestions. It's stable in ZXSpin and ZX32 simulating a 48K Speccy. Anyone like to try it on the …
... synchronise themselves; any write to screen memory during the 128 T-States ... -
Your views on...Fairlight[url=http://www.worldofspectrum.org/infoseekid.cgi?id=0001712]Fairlight[/url] Now, this is one game that I regret never playing. Tell a lie, I did t…
... updates only changing zones. Erase screen memory while running and see it ... the difference of the "selective screen update" approach between FairLight and ... -
Erase part of memory in SPIN?A question for SPIN (or perhaps Spectaculator). If I have a game loaded in memory and would like to erase part of the memory while keeping the rest …
... have a game loaded in memory and would like to ... erase part of the memory while keeping the rest of ... would like to erase the screen memory and watch what will happen ... can load a block of memory, just use a file ... right at the start of screen memory (16384). -
Erase part of memory in SPIN?A question for SPIN (or perhaps Spectaculator). If I have a game loaded in memory and would like to erase part of the memory while keeping the rest …
[QUOTE=Metalbrain;373317]You can load a block of memory, just use a file of 6912 bytes filled with zeros, and load it right at the start of screen memory (16384).[/QUOTE]
Thanks! Is there an easy way to create the zero file? -
Erase part of memory in SPIN?A question for SPIN (or perhaps Spectaculator). If I have a game loaded in memory and would like to erase part of the memory while keeping the rest …
Could you not just write a bit of basic that clears the screen to a certain ink/paper, then save off the screen memory? -
The So What's This Buzzsaw All About Then? Thread.Erm. This: [URL="http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_1.tap"]http://www.joefish.co.uk/speccy/Joefish_Buzzsaw_Demo_1.tap[/URL] Keys…
Ah, good point. If memory contention is disabled, it'll ... its timing checks against the screen memory and probably conclude that it ... -
+2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …
+2A/+3 compatibility fixes thread!It might be a good idea to keep these fairly common +2A/+3 compatibility fixes (and requests) in a single thread for quick reference ;) Let's start …
... to load into the screen memory if my memory serves me right. [/QUOTE ...R-TypeTell ya what, R-Type was an amazing bit of programming. Just re-watched the rzx of it. Stunning.:-o
... (scrolled in-place in the screen memory, even as it keeps changing ...R-TypeTell ya what, R-Type was an amazing bit of programming. Just re-watched the rzx of it. Stunning.:-o
... (scrolled in-place in the screen memory, even as it keeps changing ...New BUZZSAW+ Demo, No.2OK everybody, here's the latest demo of [I]Buzzsaw[/I]. This includes the title screen I wrote in Corfu with control selection, some new sprites and…
... (or other machines with doubled screen memory)
and doing multicolor ...Hidden routine in loading screenAs discussed in another thread, the loading screen for [B]Back To Skool[/B] seems to have a hidden routine (in blue INK and PAPER). It would be inter…
... memory) the BTS code chunk is one huge piece from screen ... main block starts loading
-screen memory is contended (means slower and ... the way how code in screen is slowed is pretty ... putting a turbo-loader in screen memory is something what is usually ...Hidden routine in loading screenAs discussed in another thread, the loading screen for [B]Back To Skool[/B] seems to have a hidden routine (in blue INK and PAPER). It would be inter…
... . Also bear in mind that screen memory is non-contiguous so whatever ... ). It also manages the yellow screen for joystick selection.
Hidden routine in loading screenAs discussed in another thread, the loading screen for [B]Back To Skool[/B] seems to have a hidden routine (in blue INK and PAPER). It would be inter…
... main block starts loading
-screen memory is contended (means slower and ... the way how code in screen is slowed is pretty ... putting a turbo-loader in screen memory is something what is usually ... is overwritten by data in screen after finishing tape load[/ ...Renumbering routinesI sometimes modify programs that either I or others have written and sensibly renumber them - usually 10/10, to make future alterations easier and ma…
... program. As it only uses screen memory then there is always room ...Stupid noobie POKEs questionHello all, I was born one year before the Speccy itself, and we always had one in our house - first the 48k rubber-keys, then a +3 - until I got an …
... copy itself into the screen memory and skip the screen loading, so it ...Micro Men - BBC4 Thursday 8th Octobereh... thats it... There was a new add for Micro Men on BBC 4 last night after 'The Cell' ( nice speccy goodness in there, including Jet Set Willy ) …
... blue lines running accross the screen.
[/QUOTE]
... like MODE 7 or the screen mode your PC starts booting ... nothing is being read from screen memory - those lines you mention.
I never really used these screen modes, they always seemed a ...Micro Men - BBC4 Thursday 8th Octobereh... thats it... There was a new add for Micro Men on BBC 4 last night after 'The Cell' ( nice speccy goodness in there, including Jet Set Willy ) …
... nothing is being read from screen memory - those lines you mention.[/QUOTE ...Framerate of Spectrum gamesI was reading a bit about framerates in modern games and it got me wondering about the Speccy. First off I'd hoped to find what framerate my old gam…
... Zx Spectrum hardware always refreshes screen display 50 fps. It can ... the screen display is built in some part of memory (called ... buffer or dummy screen) while the actual screen memory is unchanged. It ... ready it is copied to screen memory.
- games ...The 256 colour spectrumIt's amazing what you can do these days. [img]http://sites.google.com/site/pauldunn/multi64.png[/img] D.
... in the Spectrum's memory onto your TV. He ... of the screen, looks in the first screen memory location and ... 't draw the entire screen at once, but takes ... the middle of drawing the screen[/i]. If you switch ... lower half of the screen with different colours from ...The 256 colour spectrumIt's amazing what you can do these days. [img]http://sites.google.com/site/pauldunn/multi64.png[/img] D.
... in the Spectrum's memory onto your TV. He ... of the screen, looks in the first screen memory location and ... 't draw the entire screen at once, but takes ... the middle of drawing the screen[/I]. If you switch ... lower half of the screen with different colours from ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... doesn't take up more screen memory. Both of these methods will ... 6.75K to 12K of screen data. Not impossible as they ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... to allow for a 12K screen then you're not even ... yourself type LOAD "" on the screen. Even if the Speccy started ... a mode that needed extra screen memory from BASIC unless the ROM ... in the middle of the screen memory map so the system variables ...More colours II (Was: Most popular new features?)The suggested 4xCLUT multi-colour solution never took off.
... BASIC up past the second screen area. It stores its own ... yourself type LOAD "" on the screen.[/quote]
Providing you set ... a mode that needed extra screen memory from BASIC unless the ROM ... in the middle of the screen memory map for the system variables ...Speccy games programmingI've got a question. Where games written in pure machine code or was it a level higher with Assembly language being the choice? I always thought it…
... game with monitor placed in screen memory and man and machine were ...
